Abstract
A new method is presented for preparing a gas mixture with precise composition and greatly changing its consumption.
This method is distinguished from conventional methods in the following aspects. A new technique was adopted in order to achieve precise control over the constituents of the gas mixture. A new ‘constant differential pressure control method’ is used for keeping the flow quantity under control. And a widely used surge absorber is employed to provide a continuous supply in accordance with changes in consumption.
The components of the gas mixture are completely mixed in the piping by a new type of mixer. They are described in detail.
The experimental results show that the maximum dispersion of the composition in a three-component system is less than 1%.
The difference between the data of the analysis is less than the inherent scatter of the analysis of a laboratory gas chromatograph.
These results show that the flow control system and the line mixer are entirely satisfactory.
